Figure 7.

Failure cases from multiphase computed tomographic angiography (mCTA) prediction. (A) Row shows images from a patient who presented ultraearly with an onset-to computed tomography time of 21 minutes. The mCTA model significantly over-predicts follow-up infarct. (B) Row shows images from a patient without obvious occlusion; the mCTA model shows a false positive perfusion abnormality in the left posterior occipital region. (C) Row shows images of a patient with an internal carotid artery occlusion; the mCTA model under-estimates the perfusion abnormality. Column 1–3: mCTA predicted follow-up infarct, Tmax, and follow-up infarct imaging. NCCT, non-contrast-enhanced computed tomography; DWI, diffusion-weighted imaging.